CF will stop bots that respect your robots.txt, and try and stop ones that don't. If your concern is just that you don't want your content used to train an LLM, this will stop the honest companies.
If you are concerned about load on your site because the crawlers are hammering your site, the ones that respect robots.txt should be respecting your crawl delay too. CF will be able to block the dumb ones that ignore your robots.txt and hammer you with no real strategy.
But serious scrapers will have rotating residential IPs and be loading your site from real browsers, they'll take effort to appear as actual users. Sites like Ticket Master have an endless arms race against these. Some Chinese LLM company will get your data if it's public lol.